Vị trí bám phanh môi trên ở học sinh trường dân tộc nội trú xã Thái An, Quản Bạ, Hà Giang năm 2014

Objective: The purpose of this cross-sectional study was to examine the prevalence of the various types of maxillary labial frenum attachment in the pupils of the boarding-school of ethnic minority in Ha Giang province. Subjects and methods: Subjects were pupils of the boarding-school of ethnic minority in Ha Giang province, Vietnam, were clinically examined for maxillary frenum attachment location. Results and conclusions: The examined subjects were 277, with mean (t standard deviation) age of 7.7 (+ or - 3.2) years. The prevalence of the maxillary labial frenum attachment was mucosal (66.8 percent), gingival (26.7 percent), papillary (6.5 percent), and none case of papillary penetrating- type. Frenum attachment differed significantly by age (p 0.05).Mucosal attachment was significantly higher in older age group whereas gingival and papillary attachment was higher in younger age group. Frenum attachment did not differ by gender (p